The very essence of being a believer begins with Iman, a term elaborated upon in the Quran. Tafsir al-Jalalayn and Ibn Kathir both explain that true Iman means accepting the truth of the Unseen (al-Ghayb), which includes Allah, His angels, His Books, His Messengers, the Last Day, Paradise, and Hellfire, as stated in 2:3. Ma'arif-ul-Quran specifies that Iman is not merely intellectual knowledge—for even Satan possesses a mental knowledge of truth—but a firm conviction (certitude) in the heart, based on total confidence and trust in what prophets have conveyed. This is distinct from Tasdiq (confirmation) based on personal observation.

The Quran clarifies that this faith is comprehensive, requiring belief in all of Allah's messengers without distinction, as articulated in 2:285, "We make no distinction between any of His messengers"]. This principle is reinforced by the condemnation of those who "2:9 not]. The distinction between Iman and Islam is also highlighted: Iman is internal acceptance, while Islam signifies external obedience and submission, with both being inextricably linked for validity (Ma'arif-ul-Quran on 2:3).

Beyond belief, the life of a believer is characterized by action. The Quran repeatedly links faith with "righteous deeds," promising gardens [in Paradise beneath which rivers flow] to those who believe and do righteous deeds. Central to these deeds are prayer (Salah) and charity (Zakah/Infaq).

Establishing prayer (Iqamat As-Salah) is more than mere verbal recitation; it involves performing prayers correctly with all prescribed conditions, including regularity, inner concentration, humility, and awe (Ma'arif-ul-Quran on 2:3). Ibn Kathir, quoting Ibn Abbas, emphasizes completing bows, prostrations, recitation, and humbleness. The importance of congregational prayer is underscored in “bow down with those who bow in worship”. The Hanafi school and a large body of early scholars consider communal prayer (Jama'ah) necessary (wajib), with some Companions deeming individual prayer without excuse impermissible. Hadith further support this, as the Prophet Muhammad ﷺ stated that "The man who hears the call for the prayers but does not go to the mosque for the Jam-a'ah, has not offered his prayers at all, except that he should have some valid excuse" (al-Qurtubi, quoting Ibn Abbas).

Spending in the way of Allah (Infaq) encompasses all forms of charity, both obligatory (Zakah) and supererogatory (Nafl). Ma'arif-ul-Quran emphasizes that whatever one possesses is a gift from Allah, and spending a part of it is a proper act of gratitude. Zakah, the obligatory alms, is explicitly mentioned alongside prayer as a fundamental practice for believers, who will have no fear concerning them, nor will they grieve. This financial obligation is tied to economic ethics, prohibiting usury (Riba) as something that Allah destroys, while increasing charity, as seen in Allah will destroy Riba and will give increase for Sadaqat. The Quran also guides believers to spend from the good things which you have earned, warning against giving defective wealth.

Believers are exhorted to uphold justice and righteous conduct in all their interactions. This includes maintaining persistent firmness in justice, even if it goes against oneself or one's family 4:135. Such justice extends to contractual agreements, where the Quran mandates writing down debts for specified terms and having witnesses present to prevent doubt and ensure fairness 2:282. This highlights the importance of transparency and accountability in financial dealings.

Beyond individual conduct, believers are entrusted with collective responsibilities. The Islamic Ummah (community) is described as a midmost community, that you be witnesses over mankind, implying a role of leadership and justice for all humanity. This entails "enjoining good and forbidding evil," a duty that Muslim scholars define as a collective obligation (fard kifayah) on the community, to be carried out by a dedicated group of Muslims (Tafsir al-Jalalayn on 3:104). The Prophet Muhammad ﷺ underscored this, saying, "Whoever among you witnesses an evil, let him change it with his hand. If he is unable, then let him change it with his tongue. If he is unable, then let him change it with his heart, and this is the weakest faith" (Muslim).

Believers are also warned against forming intimate alliances with disbelievers who harbor animosity towards Islam, as such relationships could lead to harm and spiritual corruption 3:118 ruin]. However, this prohibition is not against all interactions; rather, it differentiates between deep emotional loyalty (Muwalat) and general benevolent relations (Muwasat) or polite dealings (Mudarat), which are permissible with non-belligerent non-Muslims (Ma'arif-ul-Quran on 3:28).

The path of belief is not without challenges. The Quran prepares believers for trials and hardships, reassuring them to seek help through patience and prayer. Patience (Sabr) is a comprehensive virtue, encompassing steadfastness in obedience, restraint from sin, and endurance of suffering, expecting reward from Allah (Ma'arif-ul-Quran on 2:153). Prayer is seen as a perfect model of Sabr, providing a special efficacy in overcoming difficulties. The Prophet Muhammad ﷺ exemplified this by turning to nafl (supererogatory) prayers when faced with grave problems (Ma'arif-ul-Quran on 2:153).

The experiences of earlier prophets and communities serve as lessons in resilience. The story of Prophet Ibrahim (Abraham) being tested with severe commands and fulfilling them successfully is cited as a model of faithfulness (Tafsir Ibn Kathir on 2:124). Similarly, the trials faced by the early Muslim community, such as the Battle of Uhud, are presented not as punishments but as tests to distinguish sincere believers from hypocrites and to strengthen their faith 3:139 believers]. Victory, whether at Badr with fewer numbers or despite temporary defeat at Uhud, ultimately comes from Allah's support, not merely from material strength (Ma'arif-ul-Quran on 3:121).

For their unwavering faith and righteous deeds, believers are promised immense rewards in the Hereafter. The Quran consistently describes Paradise as a place of gardens [in Paradise beneath which rivers flow], offering purified spouses and eternal bliss. The fruits in Paradise, though resembling earthly ones in appearance, will differ in taste, providing ever-renewing joy (Ibn Kathir on 2:25). Ma'arif-ul-Quran highlights that the wives in Paradise will be purified from all physical and moral impurities.

The ultimate reward is not just physical comfort but the pleasure and approval of Allah and approval from Allah. This divine approval is described as greater than any other blessing, guaranteeing that no fear or grief will touch them in the afterlife “they will have their reward with their Lord, and no fear will there be concerning them, nor will they grieve”. This promise of forgiveness and mercy is reiterated in various verses, emphasizing that Allah is Oft-Forgiving and Most Merciful to His obedient servants.

The concept of a "double recompense" is mentioned for those who believed in earlier divine books and then embraced Islam, recognizing the finality of Prophet Muhammad's message (Ma'arif-ul-Quran on 2:5). This underscores the continuity of divine guidance and the importance of accepting the ultimate revelation. Furthermore, martyrs who die in the cause of Allah are described as "not dead but living, with their Lord, and they have provision], enjoying immediate delights and awaiting their brethren in faith (Muslim).

The Believers are thus individuals of deep conviction, disciplined in their worship, just in their dealings, resilient in the face of adversity, and ultimately destined for eternal success in the presence of their Lord. Their lives serve as a testament to the transformative power of faith and the comprehensive guidance of Islam.